Fix error: invalid value 'cargo-pgrx@0.11' for '[CRATE[@<VER>]]...': …

…unexpected end of input while parsing minor version number

docker/Dockerfile

@@ -53,8 +53,8 @@ ARG PGOLDVERSIONS="12 13 14 15"
 ARG WITH_PERL=false
 ARG DEB_PG_SUPPORTED_VERSIONS="$PGOLDVERSIONS $PGVERSION"
 ARG GO_VERSION=1.23.0
-ARG PGRX_VERSION12=0.12
-ARG PGRX_VERSION11=0.11
+ARG PGRX_VERSION11=^0.11
+ARG PGRX_VERSION12=^0.12
 
 ENV CARGO_HOME="${HOME}/.cargo"
 ENV PATH="${PATH}:/usr/local/go/bin:${CARGO_HOME}/bin"